yaeney



(No Model.)

FIG-.8.

2 Sheets-Sheet 1.

W. W. VARNEY.

DRILLING MACHINE.

Patented Dec. 22 1891.

H1 & w

2 SheetsSheet 2.

W. W. VARNEY.

DRILLING MAGHINE.

(No Model.)

No. 465,619: Patented Dec. 22, 1891.

IIEEIJ )I I'll ivvnlill V MA I 4 SW NITED STATES PATENT OFFICE.

XVILLIAM V. VARNEY, OF BALTIMORE, MARYLAND.

DRILLING-(MACHINE.

SPECIFICATION forming part of Letters Patent No.4.65,619,dated December 22, 1891.

Application filed $eptember 5, 1.890. Serial No. 364,052. (No model.)

To all whom it may concern:

Be it known that 1, WILLIAM W. VARNEY, a citizen of the United States, residing at Baltimore, in the State of Marylanchhave invented certain new and useful Improvements in Drilling-Machines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it .appertains' to make and use the same. i

The object of my invention is to produce a drilling-machine which will be light, compact, and simple in its construction, in which the drill-stock will have in two directions movement, so that it may be operated in various positions, and the driving-shaft so arranged that the said drill-stock may be operated at various distances from the source of power without moving said source of power, and by means of which the drill may be thrown into or out of motion readily without interrupting the driving mechanism, and the said stock allowed to slip or rotate independently of said driving mechanism, if the drill should become jammed or stopped, so as to prevent injury to the tool or the mechanism of the machine.

The invention also hasfor its-object to hold the machine in position and prevent it from dropping when the drill has accomplished its work, as more fully hereinafter explained.

The above-mentioned objects I attain by the means illustrated in the accompanying drawings, in which- Figure 1 represents afront elevation of the drill-stock frame detached from the main frame, showing also the drill-stock, worm gear-wheel and supporting-dog holding the device to a supporting beam or timber. Fig.

-2 represents a view,"partlyin vertical section, showlng the drill-stock frame at right angles to the position represented in- Fig. 1, and the main frame and driving-gear in connection therewith. Fig. 3 represents a top View of aportion of the machine, showing the dog whereby the machine is held in position. Fig. 4 represents a plan view and partly a horizontal sectional View of my improved machine. Fig. 5 represents a similar view showing a continuation of the driving-shaft, partly represented in Fig. l. Fig. 6 is a transverse section on line 00 w of Fig. 4.. Fig. 7 represents a detached sectional view of the mechanism whereby a friction-clutch forming part of my invention is operated. Fig. 8 represents a transverse sectional view taken on the line 3 y of Fig. 4; and Figs. 9 and 10 represent modifications of the driving-gearing of the machine. Fig. 11 represents a detached detail view of the mechanism for elevating and lowering the friction-clutch which drives the drill-shaft.

Referring to the drawings, the letter A indicates the drill-stock frame. The said frame is constructed in two parts, one part consti tuting a cap A The portion A is provided with a lateral trunnion N, and the part A with a trunnion N, which is diametrically opposite the trunnion N when the two parts of the said frame are together and in position, the parts when together being connected by screw-bolts or otherwise, as shown in Fig. 1 of the drawings. One portion of the frame is recessed, as indicated by the letter A for the reception of a worm-wheel K, hereinafter described, and the said portion of the frame A is provided with sleeves B B. The up per one of said sleeves is internally screwthreaded.

D indicates an externally-screw-threaded shaft, the threads of whichintergear with the internally-screw-threaded portion of the sleeve B. The upper end of the said shaft is tapered, forming a conical journal, which may be'seated in a suitable hearing when the machine is in use, as indicated in Figs. 1 and 2 of the drawings. The said shaft near its upper end is provided with a hand-Wheel E,

having recesses at its periphery for the reception of alever or levers to turn the said wheel and shaft when extra power is required. The screw is for the purpose of advancing the tool to its work, as usual.

Above the wheel the screw is provided with lateral lugs F, which may be engaged by the lower hooked ends of a bifurcated dog G. The upper end of said dog extends laterally at right angles over the lower hooked ends and is provided with a clamping-screw H, having a conical bearing-point at its lower end and a cross-arm at the upper end, by means of which it maybe clamped to a beam or timber, as shown in Figs. 1. and 2, so to hold the device and prevent it from dropping when the drill has finished its work. The lower end of the drill-stock is socketed for the reception of the drill, as usual. The dog G 1s intended to be used only when working downward either vertically or at an angle; but when working in other positions it is unnecessary and may be dispensed with.

The exterior of the drill-stock C is shouldered at I, Fig. 2, and above said shoulder is keyed a worm gear-pinion K, which is confined to its seat by means of a collar L, secured to the drill-stock by means of the screws M. The trunnions or journals of the drillstock frame have bearings in boxes P of a main frame R, which carries the mechanism by means of which the power to drive the drill 1s transmitted thereto. The said frame 1s construct.ed in two parts, having flanges S, Fig. 6, which are united by means of bolts T. between said flanges and extending down into recesses in one side of the parts of the frame are located Washers T which permit the parts to be properly adjusted around the sleeve carrying the driving-shaft. This is effected by setting the washers against the shaft as they become worn, which is done by loosening the screw-bolts temporarily and iftlerward clamping the parts together by said The letter U, Fig. 4, indicates a hollow shaft,

which is journaled in bearings in the drillstock frame above mentioned. The exterior of said shaft is provided with a worm V, which intergears with the worm-pinion K, in order to give motion thereto. Upon the said shaft U 1s also mounted loosely a bevel-cog pinion W, which is provided with a recess at one slde, and which oversets a friction-disk X. The pinion W is held in place by a collar W which 1s secured to the shaft U by means of screws prior to placing the worm and pinion thereon. The said friction-disk is a conic frustu m or truncated cone, and the recess in the pmion \V corresponds to the contour of its periphery. The disk being loosely mounted on the shaft U, it may be moved longitudinally thereon.

The letter Y indicates a rod extending through the hollow shaft and through the trunnion N of the frame A, projecting beyond the same. The projecting end of the rod is surrounded by a short sleeve A, which is arranged to turn in a bearing in the frame R,

and which is provided with a handleB for the purpose of turning it. The extremity of the rod is reduced in diameter and passes through an opening in the head or upper part of the sleeve, the said head being recessed on its outer face to form a seat for a washer a.

and a nut 17, secured to the reduced end of the shaft, by means of which the sleeve is confined to said shaft. The sleeve is provided with an oblique cam-slot Z, Fig. 4,into whlch extends the plain end of a screw 2", extending through the portion of the frame R inner shaft.

in which the sleeve has its hearing, so as to shift the rod Y longitudinally when the said sleeve is turned.

The rod Y, at the end opposite to that to which the sleeve is connected, is provided with a transverse key D, Figs.4 and 7, which passes throughdiametrically-opposite slots E in the hollow shaft U and throilgh a transverse opening in the clutch-disk X, so as to move the disk longitudinally on the shaft and throw it into or out of frictional contact with the wall of the recess in the pinion W. The pinion N intermeshes with a bevel gearwheel F, secured to one end of ahollow shaft G, having bearings in the bushings H I at the ends of the tube K, which forms the handle of the machine. The said tube K is secured between the parts of the frame R and extends laterally therefrom. WVithin the hollow shaft G is located a sliding hollow telescopic shaft L, having on its inner end a bushing Z and having a bearing in a bushing Z, secured in the outer end of the hollow shaft G. Said shaft L is provided with an exterior longitudinal spline M, Fig. 8, which moves in a groove on the interior of the bushing Z, so asto permit longitudinal movement of the inner shaft, but cause the two shafts to be rotated together when power is applied to the Said inner shaft at its outer end is provided with a projecting rod N Fig. 5, which is riveted in place, and the said rod is provided with an oversetting hollow shaft P, secured by means of a set-screw R. The mechanism for driving the drill is connected with said oversetting shaft by means of suitable gearing, a portable electromotor being preferably employed. Any other driving mechanism may, however, be used. Additional telescopic shafts may be employed, if

desired, to enable the drill to be worked at a greater distance from the source of power.

In the modification shown in Figs. 9 and 10 of the drawings, the worm-gear and Worm are omitted,and adouble-beveled gear-wheel S and miter-wheel T substituted therefor, the double-bevel gear-wheel being driven by the miter-wheel F on the inner end of the tubular driving-shaft before mentioned.

In assembling the various parts of the machine the rod Z, Fig. 4, is placed in position on the tubular shaft U. The friction-clutch diskX is then keyed to the rod by means of the key D. The collar W is then slipped on the shaft U and adjusted and fastened with the driving mechanism properly ar-\ ranged, are brought together, the. trunnion's or ournals of the frame A being seated in their bearings in the meanwhile, and the parts of the machine are then all secured together in proper working position by bolting the parts of the main frame together, as shown in Figs. 3 and (3.

The operation of my machine is as follows: The device being secured in position, as

shown in Figs.- 1 and 2, power applied to the shaft P is transmitted through the telescopic shafts and intermediate gearing to the toolstock. hen it is desired to stop the drill, the rod Y is turned to release the frictionclutch mechanism, consequently stopping the motion of the drill-stock without stopping the driving mechanism. The frictionclut'ch also slips in case the drill meets with an obstruction, thus preventing injury thereto or to the operating mechanism. hen drilling downward in a vertical position or at an angle, the dog G is employed to prevent the drill and the machine from dropping when the workis finished. In drilling in other positions the dog may be removed, as it is not necessary.

It will be perceived that the frame A has a swinging motion on its trunnions or journals, so that the drill may be worked at any angle, and the main frame and driving mechanism may be moved around the driving-shaft, thus permitting the drill to havea universal movement with relation to said driving-shaft,which enables it to be operated in any desired position to said driving-shaft and at an angle thereto without either moving said drivingshaft or the source of power.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination, in a drilling-machine, of a driving-shaft, a main frame R, adapted to turn upon the driving-shaft, a drill-stock frame A, having trunnions N N mounted in hearings in the main frame, the drill-stock mounted in said drill-stock frame, and inter mediate gearing connecting the driving-shaft and drill-stock, all constructed, arranged, and

, operating substantially as specified, whereby 3. The combination, in a drilling-machine, of the drill-stock frame A, and the main frame R, carrying the driving mechanism, the drillstock frame being provided with trunnions N N, journaled in bearings in the main frame, and the intermeshin g drill-stock and drivinggearing whereby the drill-stock may be adjusted and rotated at various angles to said driving-shaft, substantially as shown and described.

4-. In a drilling-machine, the combination, with the rotatable drillstock O and the driving-shaft, of the bevel gear-wheel F, mounted on said driving-shaft, the worm V, and bevel -pinion \V, mounted on a transverse shaft, and the worm gear-wheel mounted on.

the drill-stock, whereby said drill-stock may be operated in various positions, substantially as shown and described.

5. In a drilling-machine, the combination of atelescopic driving-shaft, a main frame R, adapted to turn on said driving-shaft, a drillstock frame A, having trunnions mounted in hearings in the main frame, a drill-stock mounted in said drill-stock frame, and intermediate gearing connecting said drill-stock and driving-shaft, all constructed, arranged, and operating substantially as shown and described.

6. The combination, with the drill-stock O andthe driving-pinion W, of a friction-clutch X and mechanism for operating the same to throw the drill-stock into or out of gear with said driving-pinion, substantially as shown and described.

7. The combination, with the recessed driving-pinion W, of the friction-clutch disk X, the movable rod connected with said disk, the sleeve A, oversetting said rod and connected with the same and provided with a cam-slot, a screw 1', passing through the sleeve-bearing, and the handle B whereby the sleeve may be turned to shift the rod to engage or disengage the clutch mechanism, all constructed, arranged, and operating substantially as shown and described.

8. The combination, with the threaded shaft D for advancing the drill-stock, and the lateral lugs F, projecting from the same, of the dog G, engaging said lugs and provided with a binding-screw by means of which the device may be fastened to a suitable support, substantially as shown and described.

In testimony whereof I affix my signature in presence of two witnesses.

\VILLIAM IV. VARNEY.

Witnessess:

WM. H. VARNEY, M. E. VARNEY. 

